diff --git a/arch/arm/boot/dts/bcm7445.dtsi b/arch/arm/boot/dts/bcm7445.dtsi
index 0ca0f4e523d0..b183dc99111a 100644
--- a/arch/arm/boot/dts/bcm7445.dtsi
+++ b/arch/arm/boot/dts/bcm7445.dtsi
@@ -76,7 +76,7 @@ serial@40ab00 {
 			reg-shift = <2>;
 			reg-io-width = <4>;
 			interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
-			clock-frequency = <0x4d3f640>;
+			clock-frequency = <81000000>;
 		};
 
 		sun_top_ctrl: syscon@404000 {